Accessory for a cleaning appliance



FIG. 1 is a front view of an accessory for a cleaning appliance showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a side view opposite FIG. 5. 

We claim the ornamental design for an accessory for a cleaning appliance, as shown and described. 